Dye.



. UNITED sfrn rnsrnrnnr v EPIC.

GEOBG HOLSTE, DIE VOHWINKEL, NEAR ELBERFELD, GERMANY, ASSIGNOB TO FAB.-LENFABRIKEN VORM. FRIEDB. BAYER & ('30., OF ELBEBFELD, GERMANY, A (JOB-POR'ATION F GERMANY.

No. Drawing.

. To all whom it may concern:

tor of philosophy, chemist, citizen of the German Emplre, residing atVohwinkel, near Elberfeld, Germany, have invented new and usefulImprovements.inNew Dye, of which the following is a specification. 1 lhave found that new and valuable products can be obtained by condensingnitrobenzoyl chlorids. such as Y -ooc1 cooli cool with aminobenzoylaminoacids and reducing the products thus obtained.

The new products are distinguished by the remarkable property, that theyhave the same afiinity-for the fiberas the socalled substantive dyes andthat they can be fixed on the fiber in the same way as these colors.Cotton thus prepared can be diazotized on the fiber and combined withsuitable azo dyestufi' components.

The new products are after being dried and pulverized in the shape oftheir alkaline salts grayish powders soluble in water, being split up byhot caustic soda lye into the amino -acids,and aminobenzoic acid.

In order to illustrate the new process more fully the following exampleis given, the parts being by we1ghtz-52 parts ofdiaminostilbene-disulfonic acid sodium salt) are stirred up with 500parts of hot water and 20 parts of sodium carbonate. Subsequently partsof molten para-nitrobenzoyl chlorid are slowly added during stirring.When the reaction is complete 200 parts of iron filings and'100 parts ofacetic acid are added to the mixture of the reaction. It is renderedalkaline with soda and filtered. From the filtrate the sodium salt ofthe compound is precipitated by the addition of common salt. The productthus obtained isthen stirred up with 10 I a parts of hot water and tothe resulting mixture 50 parts of finely owdered or moltenpara-nitrobenzoyl chlorid are added in the course of half an hour whilethe mixture -is well stirred. When the reaction is complete the nitrocompound isreduced in the same Way as above described. The mixture isrendered alkaline and filtered.

i Specification of Letters Patent. Application filed Februiry 21, 1912.Serial No. 678,986.

DYE.

natemeah r. 22, 19.13.

From the re'snlting solution the new compound is salted out and filteredoff. The product thus obtained goes on the fiber without coloring thesame, but on-diazotization on the fiber and on combination with suitableazo dyestutf components, valuable fast shades are produced.Beta-naphthol used as such a component or developer furnishes a fastred, Lphenyl-3-methyl-5- pyrazolone a greenish-yellow fast to light,washing and cross-dyeing.

()t-her aminobenzoylamino acids can be used c. aininobenzoylaminoderivatives of diumiuodiphenylurea-disulfonic acid, sulfonic acids ofbenzidin, tolidin, dianisidin. benzidin-sulfon, aminoazobenzene,toluylenedlamm, phenylenedlamin, acetyl- .diazotized on the fiber andcombined with azo dyestufi components, valuable fast shades being thusobtained, substantially as described.

' 2. The new dyestuffs being chemically aminobenzoylaminobenzoylcompounds of amino acids which have no'afiinity for the fiber, which areafter being-dried and pulverized in the shape of their alkaline saltsgrayish powders soluble in water; possessing afiinity for the fiber, andwhich can be diazotized on the fiber and combined with azo dyestufl'components, Valuable fast shades being thus obtained, substantially asdescribed.

The new dyestufis being chemically amino-benzoylamlno-benzoyl compoundsof -d1am1no sulfonic acids which are after being dried and pulverized inthe shape of theiralkaline salts grayish powders soluble in water;possessing affinity for the fiber, and which can be diazotized on thefiber and combined with azo dyestufi' components, valuable fast shadesbein thus obtained, substantially as describe 4..The new dyestufis beingchemically aminobenzoylaminobenzoyl compounds of diamino disulfonicacids which are after 1 being dried and pulverized in the shape of andcombined with 217.0 dyestufi' components, valuable fast shades beingthus obtained, substantially-as described.

The new dyestufl bein chemically an eminobenzoyl-amino-benzoy compoundof (liaminostilbene-disulfonic acid, which is after being dried' andpulverized in the shape of itsalkaline salt a grayish powder soluble inwater; possessin aflinity for the fiber, and which can be iazotized onthe fiber and combined with azo dyestuff components, valuable fastshades being thus obtained, substantially as, described;

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

GEORG H( )LSIE. L. s.[ \Vitnesses i HELEN NUFER,

ALBERT Norma.

